-34.84% is the change from 643 to 419
Calculation steps:
[( 419 - 643 ) ÷ 643] x 100 = -34.84%
Formula
Percentage change = [(419 - 643) / 643] x 100
Subtract the new number by the original number
419 - 643 = -224
-224 ÷ 643 = -0.3483670295489891
-0.3483670295489891 x 100 = -34.84%